Windows 7 Pro x64 - I would have liked to upgrade to Windows 10 but torrent sites are blocking it (for good reason), its the most spying OS released yet (aswell as them blocking torrent trackers, they spy on you like nobodys businesss if you read the T&C's they actuall keylog you, believe me or not, their are videos on youtube showing you how to make it a bit more private..

Tried 8 but caused a few issues so went back to 7 ..been here since a few weeks after the release of 7.

8 is terrible, had to deal with it and angry customers eveyday at work

We use Debian and mate for our profession (vfx feature film and tv) and play arround with 10 in the moment

Windows 7 64bit, tried Windows 8 & 10. But didn't really like them that much.

Windows 7 on desktop, Windows 10 Education Edition on laptop.
Love IT privileges

Windows 8.1 .. but in the future i'm thinking upgrading to 10

OS X El Capitan ! I love it!

For my daily driver, Linux for past 10+ years. I just have to have OS which is listening to my commands

Of course for gaming only there is also a win 8.1 copy on isolated computer.

Windows 7